Hydraulic reservoir design for implement and steering circuits on track and wheel loaders plays a very important role in the performance of these circuits. A reservoir provides air and oil for all the circuit requirements and enables entrained air to separate from the oil. In addition, a reservoir has considerable potential as an efficient heat exchanger. Good reservoir design should be aimed toward adequate air and oil capacity and the most desirable oil circulation to reduce heat build-up and minimize aeration for longer pump life. Accessibility for convenient service is a result of good planning and careful selection of the reservoir's location on the vehicle.To achieve the best possible reservoir, all of the aforementioned facts must be kept uppermost in the design engineer's mind from the start of the initial design through field evaluation and final design for production.